proof; evidence — something that shows or verifies that a fact or claim is true
この記録が彼の無実の証になるかもしれない。
This record might serve as proof of his innocence.
研究結果は仮説の正しさを証している。
The research results provide evidence supporting the hypothesis.
君の努力が実績となって証を示している。
Your efforts are showing as achievements that serve as proof.
as a suffix: a certificate, license, permit, or card that proves identity or membership (e.g., -certificate, -card)
運転免許証を窓口に提示してください。
Please present your driver's license at the counter.
図書館の会員証を忘れてしまい、借りられなかった。
I forgot my library card and couldn't borrow any books.
Buddhist term: a sign or proof of enlightenment or the result of spiritual practice
ある宗派では、修行の深さが証とされることがある。
In some sects, the depth of practice is regarded as proof (of attainment).
in traditional Chinese/Japanese medicine: the diagnosis type or pattern (symptom constellation) indicating the patient's condition
漢方医は脈や舌を見て患者の証を判断した。
The Kampo/Chinese medicine doctor examined the pulse and tongue to determine the patient's pattern (diagnosis).